Improvement in grain-car doors



J'. M. DUNCAN. GRAIN` CAR DOORS;

Patented on. 1'1. 187s.

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N. PETERS. PHOTO-LITHOGRAPHER. WASHINGTON. D. C.

JAMES M. DUNCAN, OF COVINGTON, INDIANA.

IMPROVEMENT IN GRAIN-CAR DOORS.

Specication forming part of Letters Patent No. 183,287, dated October 17,1876; application led September 22, 1876.

To all whom it may concern:

Be it known that I, JAMES M. DUNCAN, of Covington, in the county of Fountain and State of Indiana, have invented a new and Improved Grain Car Door, ot which the following is a speciiication:

Figure l represents the side of a car with my improved door attached. Fig. 2 represents the portion of the door when thrown open. Fig. 3 is a transverse section on line .fr

-win Fig. 1.

Similar letters of reference indicate corresponding parts.

My invention relates to a new and improved grain-ear door; and it consists of a door made in two parts, each part being pivoted at its upper and outer corner tov one of the doorposts, and capable of swinging' in a vertical plane. The separating-line ot' the door is an are described from the pivot of one of the doors, making the edge of one of the doors convex, and that of the other concave. It also consists in a hinged bar for sustaining the door when closed, which rests in recesses in the door-posts, and in brackets for supporting the bar and doors when opened.

Referring to the drawing, A is the car-door, which consists oi' the parts' a and b. 'Ihe part a is pivoted to the door-post at c, andhas its edge that meets the part b formed on an arc described from the pivot c. The part bis pivoted at d, and its edge is made concave to conform to the convexity of the part c. The meeting edges of the doors are rabbeted, which makes the joint-grain tight. The doors are provided with niches or handles at e, for convenience in handling. B is a bar for supporting the door A, that extends across the doorway, and rests in recesses in the doorposts. It is hinged at f, so that it may be folded back out of the way. A bracket, g, is attached to the side of the car for the part a to rest upon when thrown open, and also for supporting the bar B. A bracket, h, is also provided for supporting-the part b.

When the doors are closed a pin, t', is passed vthrough the bar B into the parta, which prevents the door from becoming accidentally opened.

The pivots or hinges of the parts of the door are simply stout bolts running through the door and door-post, and provided with a washer of large diameter at the inside of the door. The hinge ofthe bar should not be detachable, as it is entirely out of the way when swung back,and, being on a pivot, it is not inconvenient to fold back.

Ihe advantages 'claimed for the improvement are, first, that the door closes tightly, andis notliable to become accidentally opened 5 at the same time it may be readily opened by removing the fastening-pin and turning the sections of the door on their pivots` 5 second, it avoids the necessity of nailing the doors when loading, and ot' damaging or destroying them in opening; third, being in two sections,

makes them lighter and more convenient to shippers than any door now in use.

Having thus described my invention, I claim as new and desire to secure by Letters Pat entl. A grain-car door made in two parts, each of whichis pivoted at the upper and outer corner to one of the car-door parts, and is eapable of swinging in a vertical plane, the sep- V 

